ant/src/tests/antunit/taskdefs/macrodef-test.xml

<project name="length-test" default="antunit"
         xmlns:au="antlib:org.apache.ant.antunit">

  <import file="../antunit-base.xml" />

  <target name="testDefaultTest">
    <macrodef name="test-log">
      <text name="log" default="DEFAULT-LOG-VALUE"/>
      <sequential>
        <concat>@{log}</concat>
      </sequential>
    </macrodef>
    <test-log/>
    <au:assertLogContains text="DEFAULT-LOG-VALUE"/>
    <test-log>THIS IS NOT DEFAULT LOG</test-log>
    <au:assertLogContains text="THIS IS NOT DEFAULT LOG"/>
  </target>


</project>